Placard templates set with abstract halftone lines rays, 80s memphis geometric style poster design elements. Retro art halftone vector illustration for banners, flyers, placards and party posters. Shutterstock Image - Placard templates set with abstract halftone lines rays, 80s memphis geometric style poster design elements. Retro art halftone vector illustration for banners, flyers, placards and party posters. - ID: 790239388